翻訳と辞書 Words near each other ・ Lanker See ・ Lankershim ・ Lankershim Boulevard ・ Lankershim, California ・ Lankesa ・ Lankesh Patrike ・ Lankeshwar Temple ・ Lankester ・ Lankester Botanical Garden ・ Lankester Merrin ・ Lankesterella ・ Lankesterella (protozoa) ・ Lankeswari Temple ・ Lankeswarudu ・ Lankeys Creek, New South Wales ・ Lankford coefficient ・ Lankford Corner, Virginia ・ Lankford House ・ Lankford Smith ・ Lankhmar ・ Lankhmar (board game) ・ Lankhmar – City of Adventure ・ Lankhor ・ Lankhorst ・ Lankiam Cay ・ Lankin, North Dakota ・ Lankinen ・ Lanko International Conference & Exhibition Tower D ・ Lankoue Department ・ Lankower See (Dechow) Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Lankford coefficient ： ウィキペディア英語版 Lankford coefficient The Lankford coefficient (also called Lankford value, R-value, or plastic strain ratio)〔Lankford, W. T., Snyder, S. C., Bausher, J. A.: ''New criteria for predicting the press performance of deep drawing sheets.'' Trans. ASM, 42, 1197–1205 (1950).〕 is a measure of the plastic anisotropy of a rolled sheet metal. This scalar quantity is used extensively as an indicator of the formability of recrystallized low-carbon steel sheets.〔Ken-ichiro Mori, ''Simulation of Materials Processing: Theory, Methods and Applications'', (ISBN 9026518226), p. 436〕 == Definition == If $x$ and $y$ are the coordinate directions in the plane of rolling and $z$ is the thickness direction, then the R-value is given by :$$ R = \cfrac where $\backslash epsilon^p\_\}$ is the plastic strain through-the-thickness. More recent studies have shown that the R-value of a material can depend strongly on the strain even at small strains . In practice, the $R$ value is usually measured at 20% elongation in a tensile test. For sheet metals, the $R$ values are usually determined for three different directions of loading in-plane ($0^,\; 45^,\; 90^$ to the rolling direction) and the normal R-value is taken to be the average :$$ R = \cfrac\left(R_0 + 2~R_ + R_\right) ~. The planar anisotropy coefficient or planar R-value is a measure of the variation of $R$ with angle from the rolling direction. This quantity is defined as :$$ R_p = \cfrac\left(R_0 - 2~R_ + R_\right) ~. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Lankford coefficient」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.